To close the telescope, reverse the procedure for opening. Always close the
siderostat mirror cover before closing the shed roof over it. Always check that
the tracking has been turned off and that the siderostat has been stowed at
hour angle 0 and declination +30, before closing the shed roof.

FAILURE TO TURN OFF THE TRACKING AND TO PROPERLY STOW THE
SIDEROSTATBEFORE CLOSING THE SHED ROOF
COULD RESULT IN SEVERE DAMAGE!

At the end of each night, the CAT observer should call the 120-inch
control room (5952 or 5951) to report any problems or to report that
no problems occured. The CAT control room is not routinely checked for
notes left by observers. Problems or special needs wanting the attention
of the daytime crew must be communicated to the 120-inch operator.